Trolley and trolley-support.



No. 801,225. PATENTED OCT. 10, 1905. H. P. DAVIS & G. 'AALBORG. TROLLEYAND TROLLEY SUPPORT.

APPLICATION FILED JAN. 3,1905.

2 SHEETS-SHEET 1-.

MW. h

WI NESSES: iifiw No. 801,225. PATENTED OCT. 10, 1905. H. P. DAVIS & G.AALBORG. TROLLEY AND TROLLEY SUPPORT.

APPLICATION FILED JAN. 3,1905.

INVENTORS 2 SHEETS-SHEET 2.

WITNESSES 6 Z 052% TTORNEY UNITED STATES ATENT FFIQEO ARRY P. DAVIS, OFPITTSBURG, AND CHRISTIAN AALBORG, WILKINS- BURG, PENNSYLVANIA, ASSIGNORSTO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OFPENNSYLVANIA.

TROLLEY AND TROLLEY-SUPPORT.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed January 3, 1905. Serial No. 239,517-

To all whom it may c0n0ern:

Be it known that we, HARRY P. DAVIS, residing at Pittsburg, andCHRISTIAN AALBORG, residing at WVilkinsburg, in the county of Alleghenyand State of Pennsylvania, citizens of the United States, have inventedcertain new and useful Improvements in Trolleys and Trol- Icy-Supports,of which the following is aspecification.

Our invention relates to trolleys and trolleysupports; and it has forits object to provide a trolley which will successfully collect thecurrent from a trolley-conductor when the car to which it is attached ispropelled at a high speed and which will automatically adjust itself tovariations in the height of the trolley-conductor without liability ofdisengagement therefrom A further object is to provide means for raisingand lowering the trolley and its support and for insuring good contactbetween the trolley and the trolley-conductor, which may be controlledfrom the motormans cab.

In the accompanying drawings, Figure 1 is a plan View of a trolley andits supporting and operating means constructed in accordance with ourinvention. Fig. 2 is a detail sectional view of a portion of one of themembers shown in Fig. 1. Fig. 3 is an enlarged transverse sectional viewof the trolley-bow. Fig. 4: is an enlarged longitudinal sectional viewof a cylinder and piston which are elements of our invention, and Fig. 5is a view in side elevation of the trolley and its supporting andoperating means.

Supported upon suitable insulators 1 is a base 2, comprising a cylinder3, a cylindrical bearing portion 2, and feet 3 and 3", one end of thecylinder 3 being provided with a piston-chamber 1, to which fluid undersuitable pressure may be admitted through a pipe 5 and a port 5 undercontrol of the motorman from a suitable reservoir or pump. (Not shown.)A piston 6, which operatesin the piston-chamber 4:, is provided with arigid piston-rod 7, the outer end of which projects beyond the end ofthe cylinder 3. A sleeve 8 is mounted in the outer end of the cylinder 3and constitutes a guide for the piston-rod 7. Surrounding the piston-rod7 and interposed between the inner end of the sleeve 8 and the piston 6is a helical spring 9. The sleeve 8 and the spring 9 constitute aresiliently-compressible rod for the piston 6, which by reason of itscompressibility begins to transmit the motion of the piston at a laterperiod than that at which the piston 6 begins to transmit such motion.

Pivoted to the base 2 by means of a shaft 11 with which the bearingportion 2 is provided, is a casting 12, having two arms 13, that arerespectively connected to the outer end of the sleeve 8 by means of rods14: and a cross-head 15. The casting 12 has also two arms 16, to whichare clamped the inner ends of rods or poles 17. The outer ends of therods or poles 17 are provided with castings 18, which are joined bymeans of a bar 19, so as to provide a rectangular rigid supporting-frameor boom for the trolley-bow.

Pivotally mounted in the castings 18 are levers 20, havingoppositely-projecting arms 21 and 22, that are respectively connected tocorresponding arms 23 and 2 1 of levers 25, with which the shaft 11 isprovided, by means of rods 26 and 27, helical springs 28 and 29, andbars 30 and 31. The rods 26 and 27 make loose sliding engagement withthe arms 21 and 22 and are provided, respectively, with stop-nuts 26 and27 for engagement with the outer sides of said arms. The inner or lowerend of each of the rods 26 and 27 is fastened to the outer end of thecorresponding helical spring by means of a helically-grooved cruciformblock a and nuts 6 and b, the end of the rod that projects through acentral hole in the block being provided with a screw-thread for thenuts and also to engage an internal screwthread in one end of asplice-rod 0 of larger diameter. The outer end of each of the bars 30and 31 is provided with a helically-grooved cruciform extension d, towhich the inner end of the corresponding helical spring is fastened bythe engagement of its end convolutions with the grooves. A short rod 6projects through a central hole in the block (Z, in which itislongitudinally movable, and it has a screwthread engagement with theextension-rod 0 IOO a", a m. a

licient tensile. strain. Each of the levers 25 1s provided with adownwardly-pro ecting arm 32, that is connected to the corresponding endof a cross-head 33, with which the outer end of the piston-rod 7 isprovided, by means of a rod 34.

A trolley-bow 35 is secured toinclined arms 36, with which the levers 20are provided, the upper portion of the bow having the crosssectionalform shown in Fig. 3. It comprises a stiff backing-piece 37, to whichwearingpieces 38 are attached, a groove 39, that is adapted to containsuitable lubricating material, being provided between the twowearing-pieces 38.

hen fluid-pressure is admitted to the piston-chamber at, thepiston-rod.7 is moved outward and the trolley-bow 35 is raised to anupright position by means of the rods 34, levers 25, bars 31, springs29, and rods 27.

lhe outward movement of the piston 6 compresses the spring 9 until itsresistance to compression overcomes the weight of the trolley-bow andits pivoted supporting-frame, and then the frame or boom is raised untilthe bow engages the trolley-conductor. (Not shown.) A further limitedmovement of the boom or frame is effected by the fluid-pressure, so thatthe bow may be tilted automatically into either the full-line positionor the broken-line position indicated in Fig. 5 when the car starts. Thesupply of fluid-pressure to the piston-chamber at may be then cut offand the trolley boom and bow will be maintained in their raisedpositions by the fluid already in the chamber.

ilf the car is propelled in the forward direction, the frictionalengagement of the bow with the trolley-conductors will serve to tilt itinto the position shown in full lines, this movement being permitted bythe springs 29. if the direction of motion of the car is reversed, thebow will be automatically tilted into the position indicated by brokenlines, and the springs 28 will be placed under tension, and thus serveto exert a yielding upward pressure upon the bow to compensate for minorvariations in the height of the trolleyconductor. bow is elevated on itsboom or frame by fluidpressure, that the boom or frame is then elevatedto any desired position by an increase in the fluid-pressure, that thesprings 28 and 29 permit the bow to automatically adjust itself to theone or the other of'two inclined positions according to the direction ofmotion of the car, and that the springs also insure automatic adjustmentof the bow in accordance with small variations in the height of thetrolley-conductor.

The details of construction may of course be varied from what is shownwithout departing from our invention.

\Ve claim as our invention 1. 111 a trolley and trolley-support, a boom,

a bow pivoted to the outer end thereof, means for raising the bow andmeans actuated thereby for raising the boom.

2. In a trolley and trolley-support, a boom, a bow pivoted to the outerend thereof, means for raising the bow, means for raising the boom andresilient connections between said means.

3. In a trolley and trolley-support, a cylinder, a piston, a piston-rod,a sleeve surrounding said piston-rod, a resilient connection betweensaid piston-rod and said sleeve, a boom, a bow pivoted to the outer endthereof, means for actuating said bow by the movement of saidpiston-rod, and means for actuating said boom by the movement of saidsleeve.

4. In a trolley and trolley-support, a cylinder, a piston, a piston-rod,a sleeve upon said piston-rod, a resilient connection between said rodand said sleeve, a pivoted boom or frame, connections between saidsleeve and one end of said boom or frame, a bow pivoted to the outer endof said boom or frame, and resilient connections between said bow andsaid pistonrod.

5. In a trolley and trolley-support, a cylinder, a piston, a piston-rod,a sleeve surrounding said piston-rod, a spring interposed be tween saidpiston-rod and, said sleeve, a boom or frame the extended portions ofwhich comprise parallel arms, connections between the boom and saidsleeve, a bow fulcrumed to the outer ends of the parallel arms of theboom, and resilient connections between the bow and the piston-rod. Y

6. The combination with abase embodying a cylinder, apneumatically-actuated piston, a relatively movable member and a springinterposed between the same and said piston, of a pivoted frame, acontact-bow pivoted to said frame, resilient connections between thepiston and the bow and a connection between the movable member and thepivoted frame.

7. Atrolleydevice forelectrically-propelled vehicles, in combinationwith a pneumaticallyactuated means for raising the device to asubstantially upright position, and resilient connections that permitthe device to tilt in either 7 K direction automatically according tothe direclt will be seen, therefore, that the tion of movement of thevehicle.

8. A trolley-bow for electrically-propelled vehicles, in combinationwith afluid-pressureactuated piston for raising it to an uprightposition, and means for exerting an auxiliary, yielding pressure and atthe same time permitting the bow to tilt in either direction accordingto the direction of movement of the vehicle.

9. A trolley for electrically-propelled vehicles comprising a boom orframe that is pivotally supported at one end to swing in a verticalplane, a bow pivoted to the free end of the boom or frame, afluid-pressure-actuated piston, and separate, relatively movableconnections between the piston and the boom and between the piston andthe how.

10. A trolley for electrically-propelled vehicles comprising a boom orframe that is pivotally supported at one end to swing in a verticalplane only, a bow pivoted to the free end of the boom or frame, andfluid-pressure-actuated means for successively raising the boom and thebow to their operating positions.

11. The combination with a cylinder adapted to receive fluid-pressureand a piston in said cylinder having two rods one of which isresiliently compressible, of a boom pivotally supported at one endadjacent to said piston, a trolley-bow pivotally supported upon the freeend of said boom, resilient connections between the bow and the rigidpiston-rod, and unyielding connections between the boom and theresilient piston-rod.

12. The combination with a frame that is pivotally supported at one end,of a trolleybow that is pivotally attached to the free end of the frameand means for raising the bow and the frame on their respective pivotssuccessively and for yieldingly supporting them to follow irregularitiesin the elevation of the trolley-wire above the track.

13. The combination with a frame that is pivotally supported at one end,of a trolleybow that is pivotally supported upon the free end of theframe, a fluid-pressure-actuated piston, connections between the pistonand the frame and connections between the piston and the trolley-bow,each of said connections having a resilient element whereby the trolleystructure is yieldingly supported to accommodate it to difierentelevations of the trolleyconductor.

14:. In a trolley structure for electricallypropelled vehicles, thecombination with a fluid-pressure-actuated piston having two concentricrods one of which is resiliently compressible, of a frame or boom oneend of which is pivotally supported, a contact member pivoted to thefree end of the boom or frame, link-and-lever mechanism having yieldingele ments that connect the non-compressible piston-rod with the contactmember, and nonyielding link-and-lever mechanism between thecompressible piston-rod and the boom or frame.

15. In a trolley structure for electricallypropelled vehicles, thecombination with a base and a boom having one end pivoted there to, of acontact member pivoted to the free end of the boom, a piston that isactuated by fluid-pressure, and separate yielding connections betweenthe piston and the boom and between the piston and the contact memberthat are so constructed and arranged that the contact member will bemoved into upright position before the boom is raised.

16. The combination with a cylinder adapted to receive fluid-pressureand a piston in said cylinder having two rods one of which isresiliently compressible, of an adjustable boom, a trolley-bow pivotallysupported upon said boom, connections between the bow and the rigidpiston-rod, and connections between the boom and the resilientpiston-rod.

17. The combination with a movableframe, of a trolley-bow that ispivotally attached to the frame and means for raising the bow and theframe successively and for yieldingly supporting them to followirregularities in the elevation of the trolley-wire above the track.

18. The combination with a movable frame, of a trolley-bow that ispivotally supported upon the frame, a fluid-pressure-actuated piston,connections between the piston and the frame and connections between thepiston and the trolley-bow, each of said connections having a resilientelement whereby the trolley structure is yieldingly supported toaccommodate it to different elevations of the trolleyconductor.

19. In an electrically-propelled vehicle, the combination with a movableframe and pneumatic elevating means therefor havingayieldingly-resilient member, of a trolley-bow that is pivotallysupported upon the frame and is spring-pressed toward an uprightposition but is automatically tilted in the one or theother direction,according to the direction of travel of the vehicle.

20. The combination with a movable frame, of a trolley-bow that ispivotally attached to the frame and pneumatically-actuated means forraising the bow and the frame successively and for yieldingly supportingthem to follow irregularities in the elevation of the trolley-wire abovethe track.

In testimony whereof we have hereunto subscribed our names this 30th dayof December, 190 i.

HARRY P. DAVIS. CHRISTIAN AALBORG.

I/Vitnesses:

CAROLINE E. S. MYERs, Or'ro S. SOHOIRER, BIRNEY HINES.

